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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one   *
3    * or more contributor license agreements.  See the NOTICE file *
4    * distributed with this work for additional information        *
5    * regarding copyright ownership.  The ASF licenses this file   *
6    * to you under the Apache License, Version 2.0 (the            *
7    * "License"); you may not use this file except in compliance   *
8    * with the License.  You may obtain a copy of the License at   *
9    *                                                              *
10   *   http://www.apache.org/licenses/LICENSE-2.0                 *
11   *                                                              *
12   * Unless required by applicable law or agreed to in writing,   *
13   * software distributed under the License is distributed on an  *
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
15   * KIND, either express or implied.  See the License for the    *
16   * specific language governing permissions and limitations      *
17   * under the License.                                           *
18   */ 
19  package org.apache.rat.walker;
20  
21  import java.io.File;
22  import java.util.Comparator;
23  
24  class FileNameComparator implements Comparator {
25  
26      public int compare(Object first, Object second) {
27          int result = 0;
28          File firstFile = (File) first;
29          File secondFile = (File) second;
30          if (firstFile == null) {
31              if (secondFile != null) {
32                  result = 1;
33              }
34          } else {
35              if (secondFile == null) {
36                  result = -1;
37              } else {
38                  final String firstName = firstFile.getName();
39                  final String secondName = secondFile.getName();
40                  result = firstName.compareTo(secondName);
41              }
42          }
43          return result;
44      }
45  
46  }